<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
<!--      添加角色列表区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
<!--      角色列表区域-->
    <el-table :data="rolelist" border stripe>
      <!--展开列-->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class="['bdbottom', i1 ===0 ? 'bdtop': '', 'vcenter']" v-for="(item1 , i1) in scope.row.children" :key="item1.id">
            <!--一级权限-->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 二级权限，三级权限-->
            <el-col :span="19">
<!--              通过for循环，加载二级权限-->
              <el-row :class="[i2 ===0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                </el-col>

              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
          <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>
    </el-card>
<!--分配权限的对话框    -->
    <el-dialog
      title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
<!--      树形控件-->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      rolelist: [],
      // 控制权限对话框的显示于隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中节点ID值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 根据ID删除对应权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限' +
        ', 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(`/roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      // 获取权限数据
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败！')
      }
      // 把获取到的权限数据保存到data
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归，获取角色下所有三级权限的id，保存到defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭时间
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
  .bdtop{border-top: 1px solid #eee}
  .bdbottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
